Topsoil, fill dirt, compost, lime, gypsum, sulfur, sand, gravel and soil amendments — the non-decorative bulk goods.
This is where most soil problems actually get solved. Our ground runs alkaline and often heavy, and the amendment that fixes one property is the wrong one for the next. Sulfur and gypsum are not interchangeable, and neither is a substitute for compost in ground that has no organic matter left in it.
Material chosen to be looked at rather than dug into — decorative rock, cobble, boulders — is in Rock. What is here is the material that goes under things and into things.